245404384705 has 4 divisors (see below), whose sum is σ = 294485261652. Its totient is φ = 196323507760.

The previous prime is 245404384703. The next prime is 245404384717. The reversal of 245404384705 is 507483404542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 507483404542 = 2 ⋅253741702271.

It can be written as a sum of positive squares in 2 ways, for example, as 103859886529 + 141544498176 = 322273^2 + 376224^2 .

It is not a de Polignac number, because 245404384705 - 2¹ = 245404384703 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245404384703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24540438466 + ... + 24540438475.

It is an arithmetic number, because the mean of its divisors is an integer number (73621315413).

Almost surely, 2^245404384705 is an apocalyptic number.

It is an amenable number.

245404384705 is a deficient number, since it is larger than the sum of its proper divisors (49080876947).

245404384705 is an equidigital number, since it uses as much as digits as its factorization.

245404384705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49080876946.

The product of its (nonzero) digits is 2150400, while the sum is 46.

The spelling of 245404384705 in words is "two hundred forty-five billion, four hundred four million, three hundred eighty-four thousand, seven hundred five".